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| All Patents in class 241/34 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE10,983 | Feb. 05, 1889 | J. Hendy, J.H. Hendy | Ore-feeder | |
| 421,556 | Feb. 18, 1890 | C.H. Cooley | Automatic regulator for grain-scales | ||
| 2,732,138 | Jan. 24, 1956 | M.W. Forth | Hammermill | ||
 | 3,690,568 | Sep. 12, 1972 | D.K. Alexander | Wood grinding | |
| 3,815,763 | Jun. 11, 1974 | G.A. Bilocq, E.P. Hooper | Grinder feeding system | ||